/* A night palette inspired by 葬送のフリーレン: deep blue sky, silver text, old gold trim and blue 蒼月草 flowers. */
:root {
  color-scheme: dark;
  --page: #0b1020;
  --surface: rgba(20, 26, 43, .82);
  --raised: rgba(32, 40, 64, .78);
  --ring: rgba(214, 222, 255, .14);
  --gold-edge: rgba(222, 190, 120, .45);
  --ink: #eef1f8;
  --ink2: #c4cadb;
  --muted: #98a1b8;
  --line: rgba(214, 222, 255, .10);
  --gold: #dcc08a;
  --silver: #e4e8f2;
  --green: #7fd4b0;
  --blue: #8fb6f5;
  --warn: #f0b27a;
  --serif: "Cormorant Garamond", "Shippori Mincho", serif;
  --mincho: "Shippori Mincho", "Yu Mincho", serif;
  --sans: "Zen Kaku Gothic New", "Yu Gothic UI", "Meiryo", system-ui, sans-serif;
  --mono: ui-monospace, "Cascadia Mono", Consolas, monospace;
}
* { box-sizing: border-box; }
html { background: var(--page); scroll-behavior: smooth; scroll-padding-top: 24px; }
body { margin: 0; color: var(--ink); font: 17px/1.65 var(--sans); overflow-x: hidden; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

/* Background layers. They sit behind everything, so body must not get a background colour. */
.scene, .veil { position: fixed; inset: 0; pointer-events: none; }
.scene { z-index: -3; }
.scene svg { width: 100%; height: 100%; display: block; }
.veil { z-index: -2; background:
  linear-gradient(90deg, rgba(11, 16, 32, .9) 0%, rgba(11, 16, 32, .6) 45%, rgba(11, 16, 32, .25) 100%),
  linear-gradient(180deg, rgba(11, 16, 32, 0) 0, rgba(11, 16, 32, .55) 520px, rgba(11, 16, 32, .88) 900px); }
.circle { position: fixed; z-index: -1; width: 760px; height: 760px; right: -320px; top: -300px; opacity: .16; pointer-events: none; animation: spin 240s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }
.petal { position: fixed; top: -20px; width: 10px; height: 14px; border-radius: 60% 0 60% 0; background: linear-gradient(135deg, #bcd6ff, #6f9fe8); opacity: .45; pointer-events: none; z-index: -1; animation: fall linear infinite; }
@keyframes fall { to { transform: translate(-120px, 110vh) rotate(540deg); } }
@media (prefers-reduced-motion: reduce) { .circle { animation: none; } .petal { display: none; } }

a { color: var(--blue); text-underline-offset: 3px; }
a:hover { color: #b5d0ff; }
:focus-visible { outline: 2px solid var(--gold); outline-offset: 3px; border-radius: 6px; }
strong { color: var(--silver); font-weight: 700; }
code { font: .88em var(--mono); background: rgba(214, 222, 255, .08); border: 1px solid var(--line); padding: 1px 6px; border-radius: 6px; color: var(--silver); overflow-wrap: anywhere; }
.skip { position: absolute; left: -999px; top: 8px; background: var(--gold); color: #1a1406; padding: 8px 14px; border-radius: 8px; z-index: 50; }
.skip:focus { left: 16px; }

/* Layout: a chapter list on the left, the guide on the right. */
.layout { max-width: 1240px; margin: 0 auto; padding: 0 32px 80px; display: grid; grid-template-columns: 260px minmax(0, 1fr); gap: 48px; }
.toc { position: sticky; top: 24px; align-self: start; max-height: calc(100vh - 48px); overflow: auto; padding: 4px 4px 16px; }
.content { min-width: 0; max-width: 820px; }

/* Hero */
.hero { max-width: 1240px; margin: 0 auto; padding: 88px 32px 40px; }
.eyebrow { font: italic 500 21px/1.2 var(--serif); color: var(--gold); letter-spacing: .05em; margin: 0 0 6px; }
h1 { margin: 0; font: 700 clamp(46px, 8vw, 84px)/1.05 var(--mincho); letter-spacing: .08em; color: var(--silver); text-shadow: 0 2px 24px rgba(11, 16, 32, .8), 0 0 34px rgba(160, 190, 255, .35); }
.hero .lead { max-width: 640px; font-size: 19px; color: var(--ink2); margin: 22px 0 0; }
.facts { display: flex; flex-wrap: wrap; gap: 10px; margin: 26px 0 0; padding: 0; list-style: none; }
.facts li { background: var(--surface); border: 1px solid var(--ring); border-radius: 999px; padding: 6px 16px; font-size: 15px; color: var(--ink2); backdrop-filter: blur(10px); }
.facts b { color: var(--gold); font-weight: 500; margin-right: 6px; }

/* Card with gold corners, like an old grimoire. */
.card { position: relative; background: var(--surface); border: 1px solid var(--ring); border-radius: 18px; padding: 26px 30px; backdrop-filter: blur(14px) saturate(120%); box-shadow: 0 20px 50px rgba(0, 0, 0, .3); }
.card::before, .card::after { content: ""; position: absolute; width: 18px; height: 18px; border: 1px solid var(--gold-edge); pointer-events: none; }
.card::before { top: 8px; left: 8px; border-right: 0; border-bottom: 0; border-top-left-radius: 8px; }
.card::after { bottom: 8px; right: 8px; border-left: 0; border-top: 0; border-bottom-right-radius: 8px; }

/* Path chooser */
.paths { margin-top: 34px; }
.paths h2 { font: 600 16px var(--sans); color: var(--muted); letter-spacing: .06em; text-transform: uppercase; margin: 0 0 12px; }
.path-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; }
.path { text-align: left; font: inherit; color: inherit; cursor: pointer; padding: 20px 22px; transition: border-color .2s, transform .2s; }
.path:hover { border-color: var(--gold-edge); transform: translateY(-2px); }
.path[aria-pressed=true] { border-color: var(--gold); box-shadow: 0 0 0 1px var(--gold), 0 20px 50px rgba(0, 0, 0, .3); }
.path .jp { display: block; font: 700 22px var(--mincho); color: var(--silver); letter-spacing: .08em; }
.path .en { display: block; font-weight: 700; margin-top: 4px; }
.path .desc { display: block; color: var(--muted); font-size: 15px; margin-top: 4px; line-height: 1.5; }
.route { margin: 16px 0 0; color: var(--ink2); font-size: 16px; min-height: 1.6em; }
.route b { color: var(--gold); font-weight: 500; }

/* Chapter list */
.toc-title { font: 700 18px var(--mincho); letter-spacing: .12em; color: var(--silver); margin: 0 0 4px; }
.toc-progress { font-size: 14px; color: var(--muted); margin: 0 0 8px; }
.bar { height: 5px; border-radius: 3px; background: rgba(255, 255, 255, .08); overflow: hidden; margin-bottom: 18px; }
.bar span { display: block; height: 100%; width: 0; background: linear-gradient(90deg, var(--gold), #f3dfb1); box-shadow: 0 0 8px rgba(220, 192, 138, .5); transition: width .4s; }
.toc ol { list-style: none; margin: 0; padding: 0; }
.toc > nav > ol > li { margin-bottom: 14px; }
.toc .part { display: block; font: 700 15px var(--mincho); color: var(--gold); text-decoration: none; letter-spacing: .06em; }
.toc .part small { display: block; font: 500 13px var(--sans); color: var(--muted); letter-spacing: 0; }
.toc ol ol { margin: 6px 0 0; border-left: 1px solid var(--line); }
.toc ol ol a { display: flex; align-items: center; gap: 9px; padding: 4px 0 4px 14px; margin-left: -1px; border-left: 2px solid transparent; color: var(--ink2); text-decoration: none; font-size: 14.5px; line-height: 1.35; }
.toc ol ol a:hover { color: var(--ink); }
.toc ol ol a.here { border-left-color: var(--gold); color: var(--ink); }
.gem { width: 8px; height: 8px; flex: none; transform: rotate(45deg); border: 1px solid var(--muted); border-radius: 1px; }
.done .gem, a.done .gem { background: var(--green); border-color: var(--green); box-shadow: 0 0 6px var(--green); }
.toc .reset { margin-top: 10px; background: none; border: 0; color: var(--muted); font: 13px var(--sans); cursor: pointer; padding: 0; text-decoration: underline; text-underline-offset: 3px; }
.toc .reset:hover { color: var(--ink2); }

/* Parts and steps */
.chapter { margin-top: 64px; }
.chapter-head { margin-bottom: 22px; }
.chapter-head .num { font: italic 500 19px var(--serif); color: var(--gold); letter-spacing: .05em; }
.chapter-head h2 { margin: 2px 0 0; font: 700 clamp(30px, 4.5vw, 40px)/1.15 var(--mincho); color: var(--silver); letter-spacing: .08em; }
.chapter-head h2 span { display: block; font: 600 20px var(--sans); letter-spacing: 0; color: var(--ink); margin-top: 6px; }
.chapter-head p { color: var(--ink2); margin: 12px 0 0; }
.optional-tag { display: inline-block; font: 500 13px var(--sans); color: var(--blue); border: 1px solid rgba(143, 182, 245, .4); border-radius: 999px; padding: 1px 10px; margin-left: 8px; vertical-align: middle; letter-spacing: 0; }
.recommended .chapter-head .num::after { content: "For you"; display: inline-block; margin-left: 10px; padding: 1px 10px; border-radius: 999px; font: 700 12px var(--sans); letter-spacing: .04em; color: #1a1406; background: linear-gradient(180deg, #ecd6a6, #c9a764); vertical-align: 3px; }

.step { margin-bottom: 18px; scroll-margin-top: 24px; }
.step-head { display: flex; align-items: flex-start; gap: 16px; }
.step-no { flex: none; width: 44px; height: 44px; display: grid; place-items: center; border-radius: 50%; border: 1px solid var(--gold-edge); color: var(--gold); font: 600 22px var(--serif); background: rgba(220, 192, 138, .06); }
.step.done .step-no { background: var(--green); border-color: var(--green); color: #0b1020; }
.step h3 { margin: 6px 0 0; font: 700 22px/1.3 var(--sans); color: var(--silver); flex: 1; }
.step h3 small { display: block; font: 500 15px var(--sans); color: var(--muted); margin-top: 2px; }
.step-body { margin-top: 14px; padding-left: 60px; }
.step-body > :first-child { margin-top: 0; }
.step-body ol, .step-body ul { padding-left: 22px; margin: 10px 0; }
.step-body li { margin: 6px 0; }
.step-body li::marker { color: var(--gold); font-weight: 700; }
.step-body ol ol { list-style: lower-alpha; }
.step-body p { margin: 10px 0; }
.step.done .step-body { opacity: .8; }

.check { display: inline-flex; align-items: center; gap: 10px; margin-top: 18px; padding: 9px 18px 9px 14px; border-radius: 999px; border: 1px solid var(--ring); background: var(--raised); color: var(--ink2); font: 500 15px var(--sans); cursor: pointer; user-select: none; }
.check:hover { border-color: var(--gold-edge); color: var(--ink); }
.check input { appearance: none; width: 20px; height: 20px; margin: 0; border: 1.5px solid var(--muted); border-radius: 5px; display: grid; place-items: center; cursor: pointer; }
.check input:checked { background: var(--green); border-color: var(--green); }
.check input:checked::after { content: ""; width: 10px; height: 5px; border: 2px solid #0b1020; border-top: 0; border-right: 0; transform: rotate(-45deg) translate(1px, -1px); }
.check:has(input:checked) { color: var(--green); border-color: rgba(127, 212, 176, .4); }

/* Download buttons */
.btn { display: inline-flex; align-items: center; gap: 10px; padding: 11px 20px; border-radius: 12px; text-decoration: none; font: 700 16px var(--sans); color: #1a1406; background: linear-gradient(180deg, #ecd6a6, #c9a764); box-shadow: 0 6px 18px rgba(220, 192, 138, .25), inset 0 1px 0 rgba(255, 255, 255, .4); margin: 6px 8px 6px 0; }
.btn:hover { color: #1a1406; filter: brightness(1.07); }
.btn.ghost { background: none; color: var(--gold); border: 1px solid var(--gold-edge); box-shadow: none; font-weight: 500; }
.btn.ghost:hover { color: #f3dfb1; border-color: var(--gold); }
.btn svg { width: 18px; height: 18px; flex: none; }

/* Code you copy */
.copy-box { display: flex; align-items: stretch; margin: 12px 0; border: 1px solid var(--gold-edge); border-radius: 12px; background: rgba(8, 11, 22, .7); overflow: hidden; }
.copy-box code { flex: 1; min-width: 0; padding: 14px 16px; border: 0; border-radius: 0; background: none; font-size: 15px; line-height: 1.6; word-break: break-all; }
.copy-box button { flex: none; border: 0; border-left: 1px solid var(--gold-edge); background: rgba(220, 192, 138, .1); color: var(--gold); font: 700 15px var(--sans); padding: 0 18px; cursor: pointer; min-width: 96px; }
.copy-box button:hover { background: rgba(220, 192, 138, .2); }
.copy-box button.ok { color: var(--green); }

/* Notes */
.note { display: flex; gap: 12px; margin: 14px 0; padding: 14px 16px; border-radius: 12px; background: rgba(143, 182, 245, .07); border: 1px solid rgba(143, 182, 245, .22); font-size: 16px; color: var(--ink2); }
.note::before { content: "✦"; color: var(--blue); flex: none; }
.note.warn { background: rgba(240, 178, 122, .08); border-color: rgba(240, 178, 122, .3); }
.note.warn::before { content: "!"; color: var(--warn); font-weight: 700; width: 1em; text-align: center; }
.note.ok { background: rgba(127, 212, 176, .08); border-color: rgba(127, 212, 176, .3); }
.note.ok::before { content: "✓"; color: var(--green); }
.note p { margin: 0; }

/* Keys and menu paths */
kbd { font: 600 .85em var(--sans); padding: 1px 7px; border-radius: 6px; border: 1px solid var(--ring); border-bottom-width: 2px; background: var(--raised); color: var(--silver); white-space: nowrap; }
.menu { color: var(--silver); font-weight: 700; white-space: nowrap; }
.menu i { font-style: normal; color: var(--gold); margin: 0 4px; }

/* Tables */
.table-wrap { overflow-x: auto; margin: 12px 0; border: 1px solid var(--line); border-radius: 12px; }
table { width: 100%; border-collapse: collapse; font-size: 15.5px; }
th { text-align: left; font: 500 13px var(--sans); color: var(--muted); letter-spacing: .05em; text-transform: uppercase; padding: 10px 14px; border-bottom: 1px solid var(--gold-edge); background: rgba(8, 11, 22, .4); }
td { padding: 10px 14px; border-bottom: 1px solid var(--line); vertical-align: top; color: var(--ink2); }
tr:last-child td { border-bottom: 0; }
td:first-child { color: var(--ink); font-weight: 500; }

/* Optional tools fold open. */
details.tool { margin-bottom: 14px; padding: 0; }
details.tool > summary { list-style: none; cursor: pointer; padding: 22px 28px; display: flex; align-items: center; gap: 16px; }
details.tool > summary::-webkit-details-marker { display: none; }
details.tool > summary .ico { flex: none; width: 44px; height: 44px; display: grid; place-items: center; border-radius: 12px; background: rgba(220, 192, 138, .08); border: 1px solid var(--gold-edge); font: 700 20px var(--mincho); color: var(--gold); }
details.tool > summary .t { flex: 1; min-width: 0; }
details.tool > summary b { display: block; font: 700 20px var(--sans); color: var(--silver); }
details.tool > summary span.d { display: block; color: var(--muted); font-size: 15px; line-height: 1.45; }
details.tool > summary::after { content: "+"; flex: none; width: 32px; height: 32px; display: grid; place-items: center; border-radius: 50%; border: 1px solid var(--ring); color: var(--gold); font: 22px var(--serif); transition: transform .2s; }
details.tool[open] > summary::after { transform: rotate(45deg); }
details.tool .tool-body { padding: 0 30px 26px 88px; }
details.tool .tool-body > :first-child { margin-top: 0; }
details.tool .tool-body ol, details.tool .tool-body ul { padding-left: 22px; }
details.tool .tool-body li { margin: 6px 0; }
details.tool .tool-body li::marker { color: var(--gold); font-weight: 700; }
details.tool .tool-body ol ol { list-style: lower-alpha; }
details.tool h4 { font: 700 16px var(--sans); color: var(--silver); margin: 18px 0 4px; }

.finish { text-align: center; padding: 34px 30px; }
.finish .jp { font: 700 30px var(--mincho); letter-spacing: .12em; color: var(--silver); }
.finish p { color: var(--ink2); margin: 8px 0 0; }

footer { max-width: 1240px; margin: 0 auto; padding: 0 32px 48px; color: var(--muted); font-size: 14px; }
footer .jp { font: italic 500 18px var(--serif); color: var(--gold); }

/* Mobile: the chapter list becomes a bar you open. */
.toc-toggle { display: none; }
@media (max-width: 960px) {
  body { font-size: 16.5px; }
  .hero { padding: 56px 16px 28px; }
  .layout { grid-template-columns: minmax(0, 1fr); padding: 0 16px 64px; gap: 0; }
  .path-grid { grid-template-columns: minmax(0, 1fr); }
  .toc-toggle { display: flex; position: sticky; top: 0; z-index: 10; align-items: center; justify-content: space-between; gap: 12px; width: calc(100% + 32px); margin: 0 -16px; padding: 12px 16px; border: 0; border-bottom: 1px solid var(--ring); background: rgba(11, 16, 32, .92); backdrop-filter: blur(12px); color: var(--ink); font: 700 16px var(--sans); cursor: pointer; }
  .toc-toggle .mini { flex: 1; max-width: 140px; height: 5px; border-radius: 3px; background: rgba(255, 255, 255, .08); overflow: hidden; }
  .toc-toggle .mini span { display: block; height: 100%; width: 0; background: var(--gold); transition: width .4s; }
  .toc { display: none; position: fixed; inset: 49px 0 0 0; z-index: 9; max-height: none; background: rgba(11, 16, 32, .97); padding: 20px 20px 40px; }
  .toc.open { display: block; }
  html { scroll-padding-top: 64px; }
  .step { scroll-margin-top: 64px; }
  .card { padding: 20px 18px; }
  .step-body { padding-left: 0; }
  .step-no { width: 38px; height: 38px; font-size: 19px; }
  .step h3 { font-size: 20px; margin-top: 4px; }
  details.tool > summary { padding: 18px; gap: 12px; }
  details.tool .tool-body { padding: 0 18px 22px; }
  .copy-box { flex-direction: column; }
  .copy-box button { border-left: 0; border-top: 1px solid var(--gold-edge); padding: 12px; }
  footer { padding: 0 16px 40px; }
}